Roll-relieving device.



.0 0 l 2 V o N d 8 t n 9 t a P D N W E L H U K C ROLL RELIEVING DEVICE.

(Application filedDec. 22, 1899.1

2 Sheets-Shae; I.

(No Model.)

INVENTOR WITNESSES m: NORRIS PETERS cu. PHOYOLUTNOW WASHINGTON, o. c

No. 662,445. Patented Nov. 27, I900.

. c. KUHLEWIND.

ROLL RELIEVING DEVICE.

(Application filed Dec. 22, 1899.1

2 Sheets-Sham 2.

(No Modal.)

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NlTED STATES ATENT rricn.

CORNELIUS KUI-ILEWIND, OF KNOXVILLE, PENNSYLVANIA, ASSIGNOR TO THEHYDRAULIC VALVE AND REGULATOR COMPANY, LIMITED, OF PITTS- BURG,PENNSYLVANIA.

.ROLL-RELIEVING DEVICE.

SPECIFICATION forming part of Letters Patent No. 662,445, datedNovember27, 1900.

Application filed December 22 1899. Serial No. 741,209. (No model.)

To all whom it may concern.-

Be it known that I, CORNELIUS KUHLE- WIND, of Knoxville borough, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Roll-Relieving Devices, of which the following' isa full, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification, in

to whieh-- Figure 1 is a top plan view of my improved relief device, andFig. 2 is a sectional side elevation of the same. i

'My invention relates to devices for reliev- I5 ing the pressure uponrolls and similar apparatus when such pressure reaches a certain vlimit, and is designed to provide a device of this character which willautomatically relieve the pressure and may be made in compact form as abreaker which can be used with existing mills.

In the drawings, 2 represents a hollow breaker having a verticalcylindrical screwthreaded socket containing a correspondingly 2 5screw-threaded plug 3, arranged to rotate and move vertically therein.Above this rotary plug is a cylindrical block 4, the upper portion ofwhich is squared and fits in a square hole in a cover-plate 5 to holdthe block against rotation. An annular boss 6 upon the top of thescrew-plug fits in a corresponding recess in the base of the block andholds these partsin correct relativeposition. The lower end of thescrew-plug is provided'with a circular boss 7, which fits in acorresponding recess in the top of a wedge-block 8, having aninclinedlower face fitting upon the corresponding upper face of ahorizontallymovable wedge-block 9, which rests upon the floor of thecavity in the breaker. The wedgeblock 9 is provided with a centralsquare hole containing a locking-block 10, having alocking projectionwith inclined faces which fits in a recess in the lower part ofWedge-block 8. The lower face of the locking-block is inclined and fitsupon the top of the head 11 of a horizontal slide 12, which is providedwith a stem 13, extending out through the breaker. The slide isprovidedwith side recesses which contain depending lugs in thehorizontal wedge-block, so as to draw out this block after the slide ispulled out a short distance. A spiral spring 14 surrounds the stemwithin the socket in the breaker and bears upon the end of wedge-block9, normally forcing it inwardly. A spiral spring 15 within the spring 14closely surrounds the stem 13 and bears against the base of the slideand at its outer end against a cross-head 16, sliding on guides 16,secured to the breaker. The outer portion of the guides 16 arescrew-threaded to receive adjusting-nuts 17. To the stem 13 at its outerend is secured an cared socket 18, connected by pivotal link 19 to thecurved lever 20. The lever is fulcruined at 21 and is provided with aslot 22, engaged by the upper pivot-pin of the link, so that outwardmovement of the stem in the automatic operation of the device will notactuate the handlever.

To reduce the jar and vibration-which occurs in the ordinary operatingof the rolls when the piece enters the pass therein, 1 provide the upperblock 4 with side wedge-faces which contact with similar faces on blocks23, which blocks have outer inclined faces coacting with similar faceson blocks 24, :niovable longitudinally of the breaker and normallyforced forward by springs 25. This sup- 8o plemental wedge system tendsto lift the block 1 slightly from the screw-plug and is arranged to beactuated by the ordinary working pressure upon the rolls. As the pieceenters the rolls the block 4 will be forced down in contact with thescrew-plug, moving such wedge system against its yielding pressure, andthus cushioning the action. The parts remain in this position untilexcessive pressure is exerted upon the rolls, as by a piece sticking 0therein, and when this pressure exceeds a certain limit the block at,being forced down, will cause the screw-plug to turn and movedownwardly. This turning action will force the locking-block downwardlyinto the hole in the wedge-block 9, the slide moving outwardly againstthe pressure of spring 15. As soon as the locking-block moves down thewedge-block 9 is also forced outwardly against the pressure of thespring 14. The pressure number of parts by,increasing the frictionalresistance, while the wear upon it will be substantially uniform.

Many variations may be made in the form and arrangement of the partswithout departing from my invention.

I claim l. A relief device, having a vertically-movable block, a screwarranged to be forced endwise by the movement of the block, anonrotatable innerly-screw-threaded socket surrounding the screw and ayielding pressure device acting upon the screw; substantially asdescribed.

2. In a relief device for rolls, a screw arranged to be acted upon bythe pressure on the hearings, a non-rotatable socket having innerscrew-threads engaging the screw and a yielding spring and wedge systemcoacting therewith; substantially as described.

3. In a relief device, a vertically-movable screw supported in anon-rotatable screwthreaded socket; a yielding pressure device arrangedto hold the screw in place, and a hand-controlled device for releasingthe yielding pressure device; substantially as described.

4. A relief device havinga vertically-movable block held againstrotation, an endwisemovable screw coacting therewith and arranged to berotated by end pressure thereon, a wedge arranged to be actuated by themovement of the screw, and a yielding pressure device coacting with thewedge; substantial'ly as described.

5. A relief device having a reciprocatory block held against rotation, ascrew supported in a screw-threaded socket and arranged to bear againstthe block, a wedge coacting with the opposite end of the screw, a second spring-pressed wedge coacting with said wedge, and locking mechanismarranged to hold the wedges in place; substantially as described.

6. In a relief device for rolls, an endwisemovable screw, a wedgecoacting with one end thereof, a non-rotatable socket for the screw, aspring-pressed wedge-block coacting with said wedge, a movablelocking-block between the wedges, and a hand-controlled device arrangedto release the locking-block when desired; substantially as described.

7. A relief device for rolls, having a nonrotatable socket, a screwarranged to revolve and move endwise therein, under the pressure of thebearings, and a yielding pressure device arranged to prevent rotationand movement of the screw until the pressure reaches a determined limit;substantially as described.

In testimony whereof I have hereunto set my hand.

CORNELIUS KUI-ILE WIND.

Witnesses:

G. I. HOLDSHIP, H. M. OORWIN.

